Qingdao nodular cast
iron pipe is a kind of cast iron is an alloy of iron, carbon and silicon.
Graphite of nodular cast iron exists in the form of a sphere.
The graphite particle size is usually 6 -
1 - level 7, cast pipe's quality requirements
Level 3 (
Spheroidization rate & ge;
So, as the nature of the nature of the iron and steel, the mechanical properties of the material itself is also improved.
Annealing microstructure of nodular cast iron pipe for ferrite and a small amount of pearlite.
Ductile iron pipes mainly referred to as the centrifugal ductile iron pipe.
It is the nature of the iron and steel performance, excellent corrosion resistance, good ductility, good sealing effect, install the intuitive, it is mainly used for municipal, industrial and mining enterprises, water supply, gas, oil, etc. , is the first selection of low ratio of water supply pipe.
Compared with polyethylene pipe, ductile pipe installation time than polyethylene pipe directly, quick, installed after the pressure is bad;
In terms of air tightness and corrosion resistance, air tightness after ductile pipe installation is bad, corrosion resistance is bad also can be improved through many kinds of anti-corrosion measures;
From the point of hydraulic performance, ductile pipe specification is usually refers to the inner diameter, and the specifications of the polyethylene pipe generally refers to the outer diameter, because under the same specification, ductile pipe can achieve less runoff, from the point of installation and maintenance cost, ductile pipe has more superior performance.
Wall, cement mortar anti-corrosion materials
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